 Graphite-like carbon, GLC, and tantalum, TA, have been proven to have good potential as coating as they possess mechanical properties similar to bones. The purpose of this systematic literature review is to summarise the coating techniques of these four materials in order to compare their mechanical properties and tribological outcomes. This article was authored by Hei Qing, DePonka Choudhury, M.D. Jokunai, and others.